Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * NET An implementation of the SOCKET network access protocol. |
| 3 | * This is the master header file for the Linux NET layer, |
| 4 | * or, in plain English: the networking handling part of the |
| 5 | * kernel. |
| 6 | * |
| 7 | * Version: @(#)net.h 1.0.3 05/25/93 |
| 8 | * |
| 9 | * Authors: Orest Zborowski, <obz@Kodak.COM> |
Jesper Juhl | 02c30a8 | 2005-05-05 16:16:16 -0700 | [diff] [blame] | 10 | * Ross Biro |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 11 | * Fred N. van Kempen, <waltje@uWalt.NL.Mugnet.ORG> |
| 12 | * |
| 13 | * This program is free software; you can redistribute it and/or |
| 14 | * modify it under the terms of the GNU General Public License |
| 15 | * as published by the Free Software Foundation; either version |
| 16 | * 2 of the License, or (at your option) any later version. |
| 17 | */ |
| 18 | #ifndef _LINUX_NET_H |
| 19 | #define _LINUX_NET_H |
| 20 | |
| 21 | #include <linux/config.h> |
| 22 | #include <linux/wait.h> |
| 23 | #include <linux/stringify.h> |
| 24 | #include <asm/socket.h> |
| 25 | |
| 26 | struct poll_table_struct; |
| 27 | struct inode; |
| 28 | |
| 29 | #define NPROTO 32 /* should be enough for now.. */ |
| 30 | |
| 31 | #define SYS_SOCKET 1 /* sys_socket(2) */ |
| 32 | #define SYS_BIND 2 /* sys_bind(2) */ |
| 33 | #define SYS_CONNECT 3 /* sys_connect(2) */ |
| 34 | #define SYS_LISTEN 4 /* sys_listen(2) */ |
| 35 | #define SYS_ACCEPT 5 /* sys_accept(2) */ |
| 36 | #define SYS_GETSOCKNAME 6 /* sys_getsockname(2) */ |
| 37 | #define SYS_GETPEERNAME 7 /* sys_getpeername(2) */ |
| 38 | #define SYS_SOCKETPAIR 8 /* sys_socketpair(2) */ |
| 39 | #define SYS_SEND 9 /* sys_send(2) */ |
| 40 | #define SYS_RECV 10 /* sys_recv(2) */ |
| 41 | #define SYS_SENDTO 11 /* sys_sendto(2) */ |
| 42 | #define SYS_RECVFROM 12 /* sys_recvfrom(2) */ |
| 43 | #define SYS_SHUTDOWN 13 /* sys_shutdown(2) */ |
| 44 | #define SYS_SETSOCKOPT 14 /* sys_setsockopt(2) */ |
| 45 | #define SYS_GETSOCKOPT 15 /* sys_getsockopt(2) */ |
| 46 | #define SYS_SENDMSG 16 /* sys_sendmsg(2) */ |
| 47 | #define SYS_RECVMSG 17 /* sys_recvmsg(2) */ |
| 48 | |
| 49 | typedef enum { |
| 50 | SS_FREE = 0, /* not allocated */ |
| 51 | SS_UNCONNECTED, /* unconnected to any socket */ |
| 52 | SS_CONNECTING, /* in process of connecting */ |
| 53 | SS_CONNECTED, /* connected to socket */ |
| 54 | SS_DISCONNECTING /* in process of disconnecting */ |
| 55 | } socket_state; |
| 56 | |
| 57 | #define __SO_ACCEPTCON (1 << 16) /* performed a listen */ |
| 58 | |
| 59 | #ifdef __KERNEL__ |
| 60 | |
| 61 | #define SOCK_ASYNC_NOSPACE 0 |
| 62 | #define SOCK_ASYNC_WAITDATA 1 |
| 63 | #define SOCK_NOSPACE 2 |
| 64 | #define SOCK_PASSCRED 3 |
| 65 | |
| 66 | #ifndef ARCH_HAS_SOCKET_TYPES |
Pavel Pisa | 4dc3b16 | 2005-05-01 08:59:25 -0700 | [diff] [blame] | 67 | /** |
| 68 | * enum sock_type - Socket types |
| 69 | * @SOCK_STREAM: stream (connection) socket |
| 70 | * @SOCK_DGRAM: datagram (conn.less) socket |
| 71 | * @SOCK_RAW: raw socket |
| 72 | * @SOCK_RDM: reliably-delivered message |
| 73 | * @SOCK_SEQPACKET: sequential packet socket |
| 74 | * @SOCK_PACKET: linux specific way of getting packets at the dev level. |
| 75 | * For writing rarp and other similar things on the user level. |
| 76 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 77 | * When adding some new socket type please |
| 78 | * grep ARCH_HAS_SOCKET_TYPE include/asm-* /socket.h, at least MIPS |
| 79 | * overrides this enum for binary compat reasons. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 80 | */ |
| 81 | enum sock_type { |
| 82 | SOCK_STREAM = 1, |
| 83 | SOCK_DGRAM = 2, |
| 84 | SOCK_RAW = 3, |
| 85 | SOCK_RDM = 4, |
| 86 | SOCK_SEQPACKET = 5, |
Arnaldo Carvalho de Melo | 7c65787 | 2005-08-09 20:14:34 -0700 | [diff] [blame] | 87 | SOCK_DCCP = 6, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 88 | SOCK_PACKET = 10, |
| 89 | }; |
| 90 | |
| 91 | #define SOCK_MAX (SOCK_PACKET + 1) |
| 92 | |
| 93 | #endif /* ARCH_HAS_SOCKET_TYPES */ |
| 94 | |
| 95 | /** |
| 96 | * struct socket - general BSD socket |
Pavel Pisa | 4dc3b16 | 2005-05-01 08:59:25 -0700 | [diff] [blame] | 97 | * @state: socket state (%SS_CONNECTED, etc) |
| 98 | * @flags: socket flags (%SOCK_ASYNC_NOSPACE, etc) |
| 99 | * @ops: protocol specific socket operations |
| 100 | * @fasync_list: Asynchronous wake up list |
| 101 | * @file: File back pointer for gc |
| 102 | * @sk: internal networking protocol agnostic socket representation |
| 103 | * @wait: wait queue for several uses |
| 104 | * @type: socket type (%SOCK_STREAM, etc) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 105 | */ |
| 106 | struct socket { |
| 107 | socket_state state; |
| 108 | unsigned long flags; |
| 109 | struct proto_ops *ops; |
| 110 | struct fasync_struct *fasync_list; |
| 111 | struct file *file; |
| 112 | struct sock *sk; |
| 113 | wait_queue_head_t wait; |
| 114 | short type; |
| 115 | }; |
| 116 | |
| 117 | struct vm_area_struct; |
| 118 | struct page; |
| 119 | struct kiocb; |
| 120 | struct sockaddr; |
| 121 | struct msghdr; |
| 122 | struct module; |
| 123 | |
| 124 | struct proto_ops { |
| 125 | int family; |
| 126 | struct module *owner; |
| 127 | int (*release) (struct socket *sock); |
| 128 | int (*bind) (struct socket *sock, |
| 129 | struct sockaddr *myaddr, |
| 130 | int sockaddr_len); |
| 131 | int (*connect) (struct socket *sock, |
| 132 | struct sockaddr *vaddr, |
| 133 | int sockaddr_len, int flags); |
| 134 | int (*socketpair)(struct socket *sock1, |
| 135 | struct socket *sock2); |
| 136 | int (*accept) (struct socket *sock, |
| 137 | struct socket *newsock, int flags); |
| 138 | int (*getname) (struct socket *sock, |
| 139 | struct sockaddr *addr, |
| 140 | int *sockaddr_len, int peer); |
| 141 | unsigned int (*poll) (struct file *file, struct socket *sock, |
| 142 | struct poll_table_struct *wait); |
| 143 | int (*ioctl) (struct socket *sock, unsigned int cmd, |
| 144 | unsigned long arg); |
| 145 | int (*listen) (struct socket *sock, int len); |
| 146 | int (*shutdown) (struct socket *sock, int flags); |
| 147 | int (*setsockopt)(struct socket *sock, int level, |
| 148 | int optname, char __user *optval, int optlen); |
| 149 | int (*getsockopt)(struct socket *sock, int level, |
| 150 | int optname, char __user *optval, int __user *optlen); |
| 151 | int (*sendmsg) (struct kiocb *iocb, struct socket *sock, |
| 152 | struct msghdr *m, size_t total_len); |
| 153 | int (*recvmsg) (struct kiocb *iocb, struct socket *sock, |
| 154 | struct msghdr *m, size_t total_len, |
| 155 | int flags); |
| 156 | int (*mmap) (struct file *file, struct socket *sock, |
| 157 | struct vm_area_struct * vma); |
| 158 | ssize_t (*sendpage) (struct socket *sock, struct page *page, |
| 159 | int offset, size_t size, int flags); |
| 160 | }; |
| 161 | |
| 162 | struct net_proto_family { |
| 163 | int family; |
| 164 | int (*create)(struct socket *sock, int protocol); |
| 165 | /* These are counters for the number of different methods of |
| 166 | each we support */ |
| 167 | short authentication; |
| 168 | short encryption; |
| 169 | short encrypt_net; |
| 170 | struct module *owner; |
| 171 | }; |
| 172 | |
| 173 | struct iovec; |
| 174 | struct kvec; |
| 175 | |
| 176 | extern int sock_wake_async(struct socket *sk, int how, int band); |
| 177 | extern int sock_register(struct net_proto_family *fam); |
| 178 | extern int sock_unregister(int family); |
| 179 | extern int sock_create(int family, int type, int proto, |
| 180 | struct socket **res); |
| 181 | extern int sock_create_kern(int family, int type, int proto, |
| 182 | struct socket **res); |
| 183 | extern int sock_create_lite(int family, int type, int proto, |
| 184 | struct socket **res); |
| 185 | extern void sock_release(struct socket *sock); |
| 186 | extern int sock_sendmsg(struct socket *sock, struct msghdr *msg, |
| 187 | size_t len); |
| 188 | extern int sock_recvmsg(struct socket *sock, struct msghdr *msg, |
| 189 | size_t size, int flags); |
| 190 | extern int sock_map_fd(struct socket *sock); |
| 191 | extern struct socket *sockfd_lookup(int fd, int *err); |
| 192 | #define sockfd_put(sock) fput(sock->file) |
| 193 | extern int net_ratelimit(void); |
| 194 | extern unsigned long net_random(void); |
| 195 | extern void net_srandom(unsigned long); |
| 196 | extern void net_random_init(void); |
| 197 | |
| 198 | extern int kernel_sendmsg(struct socket *sock, struct msghdr *msg, |
| 199 | struct kvec *vec, size_t num, size_t len); |
| 200 | extern int kernel_recvmsg(struct socket *sock, struct msghdr *msg, |
| 201 | struct kvec *vec, size_t num, |
| 202 | size_t len, int flags); |
| 203 | |
| 204 | #ifndef CONFIG_SMP |
| 205 | #define SOCKOPS_WRAPPED(name) name |
| 206 | #define SOCKOPS_WRAP(name, fam) |
| 207 | #else |
| 208 | |
| 209 | #define SOCKOPS_WRAPPED(name) __unlocked_##name |
| 210 | |
| 211 | #define SOCKCALL_WRAP(name, call, parms, args) \ |
| 212 | static int __lock_##name##_##call parms \ |
| 213 | { \ |
| 214 | int ret; \ |
| 215 | lock_kernel(); \ |
| 216 | ret = __unlocked_##name##_ops.call args ;\ |
| 217 | unlock_kernel(); \ |
| 218 | return ret; \ |
| 219 | } |
| 220 | |
| 221 | #define SOCKCALL_UWRAP(name, call, parms, args) \ |
| 222 | static unsigned int __lock_##name##_##call parms \ |
| 223 | { \ |
| 224 | int ret; \ |
| 225 | lock_kernel(); \ |
| 226 | ret = __unlocked_##name##_ops.call args ;\ |
| 227 | unlock_kernel(); \ |
| 228 | return ret; \ |
| 229 | } |
| 230 | |
| 231 | |
| 232 | #define SOCKOPS_WRAP(name, fam) \ |
| 233 | SOCKCALL_WRAP(name, release, (struct socket *sock), (sock)) \ |
| 234 | SOCKCALL_WRAP(name, bind, (struct socket *sock, struct sockaddr *uaddr, int addr_len), \ |
| 235 | (sock, uaddr, addr_len)) \ |
| 236 | SOCKCALL_WRAP(name, connect, (struct socket *sock, struct sockaddr * uaddr, \ |
| 237 | int addr_len, int flags), \ |
| 238 | (sock, uaddr, addr_len, flags)) \ |
| 239 | SOCKCALL_WRAP(name, socketpair, (struct socket *sock1, struct socket *sock2), \ |
| 240 | (sock1, sock2)) \ |
| 241 | SOCKCALL_WRAP(name, accept, (struct socket *sock, struct socket *newsock, \ |
| 242 | int flags), (sock, newsock, flags)) \ |
| 243 | SOCKCALL_WRAP(name, getname, (struct socket *sock, struct sockaddr *uaddr, \ |
| 244 | int *addr_len, int peer), (sock, uaddr, addr_len, peer)) \ |
| 245 | SOCKCALL_UWRAP(name, poll, (struct file *file, struct socket *sock, struct poll_table_struct *wait), \ |
| 246 | (file, sock, wait)) \ |
| 247 | SOCKCALL_WRAP(name, ioctl, (struct socket *sock, unsigned int cmd, \ |
| 248 | unsigned long arg), (sock, cmd, arg)) \ |
| 249 | SOCKCALL_WRAP(name, listen, (struct socket *sock, int len), (sock, len)) \ |
| 250 | SOCKCALL_WRAP(name, shutdown, (struct socket *sock, int flags), (sock, flags)) \ |
| 251 | SOCKCALL_WRAP(name, setsockopt, (struct socket *sock, int level, int optname, \ |
| 252 | char __user *optval, int optlen), (sock, level, optname, optval, optlen)) \ |
| 253 | SOCKCALL_WRAP(name, getsockopt, (struct socket *sock, int level, int optname, \ |
| 254 | char __user *optval, int __user *optlen), (sock, level, optname, optval, optlen)) \ |
| 255 | SOCKCALL_WRAP(name, sendmsg, (struct kiocb *iocb, struct socket *sock, struct msghdr *m, size_t len), \ |
| 256 | (iocb, sock, m, len)) \ |
| 257 | SOCKCALL_WRAP(name, recvmsg, (struct kiocb *iocb, struct socket *sock, struct msghdr *m, size_t len, int flags), \ |
| 258 | (iocb, sock, m, len, flags)) \ |
| 259 | SOCKCALL_WRAP(name, mmap, (struct file *file, struct socket *sock, struct vm_area_struct *vma), \ |
| 260 | (file, sock, vma)) \ |
| 261 | \ |
| 262 | static struct proto_ops name##_ops = { \ |
| 263 | .family = fam, \ |
| 264 | .owner = THIS_MODULE, \ |
| 265 | .release = __lock_##name##_release, \ |
| 266 | .bind = __lock_##name##_bind, \ |
| 267 | .connect = __lock_##name##_connect, \ |
| 268 | .socketpair = __lock_##name##_socketpair, \ |
| 269 | .accept = __lock_##name##_accept, \ |
| 270 | .getname = __lock_##name##_getname, \ |
| 271 | .poll = __lock_##name##_poll, \ |
| 272 | .ioctl = __lock_##name##_ioctl, \ |
| 273 | .listen = __lock_##name##_listen, \ |
| 274 | .shutdown = __lock_##name##_shutdown, \ |
| 275 | .setsockopt = __lock_##name##_setsockopt, \ |
| 276 | .getsockopt = __lock_##name##_getsockopt, \ |
| 277 | .sendmsg = __lock_##name##_sendmsg, \ |
| 278 | .recvmsg = __lock_##name##_recvmsg, \ |
| 279 | .mmap = __lock_##name##_mmap, \ |
| 280 | }; |
| 281 | #endif |
| 282 | |
| 283 | #define MODULE_ALIAS_NETPROTO(proto) \ |
| 284 | MODULE_ALIAS("net-pf-" __stringify(proto)) |
| 285 | |
Harald Welte | 4fdb3bb | 2005-08-09 19:40:55 -0700 | [diff] [blame] | 286 | #define MODULE_ALIAS_NET_PF_PROTO(pf, proto) \ |
| 287 | MODULE_ALIAS("net-pf-" __stringify(pf) "-proto-" __stringify(proto)) |
| 288 | |
Arnaldo Carvalho de Melo | 2038073 | 2005-08-16 02:18:02 -0300 | [diff] [blame] | 289 | #ifdef CONFIG_SYSCTL |
| 290 | #include <linux/sysctl.h> |
| 291 | extern ctl_table net_table[]; |
| 292 | extern int net_msg_cost; |
| 293 | extern int net_msg_burst; |
| 294 | #endif |
| 295 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 296 | #endif /* __KERNEL__ */ |
| 297 | #endif /* _LINUX_NET_H */ |